<template>
  <div class="app-container">
    <!--课程预览-->
    <div class="ccInfo">
      <img :src="coursePublish.cover" alt="课程封面">
      <div class="main">
        <h2>{{ coursePublish.title }}</h2>
        <p class="gray"><span>共{{ coursePublish.lessonNum }}课时</span></p>
        <p><span>所属分类：{{ coursePublish.subjectParentTitle }} — {{ coursePublish.subjectTitle }}</span></p>
        <p>课程讲师：{{ coursePublish.teacherName }}</p>
        <h3 class="red">￥{{ coursePublish.price }}</h3>
      </div>
    </div>

    <div style="text-align:center">
      <el-button type="primary" @click="prev">上一步</el-button>
      <el-button :disabled="publishBtnDisabled" type="primary" @click="publish">发布课程</el-button>
    </div>
  </div>
</template>

<script>

import course from '@/api/course'

export default {
  data() {
    return {
      publishBtnDisabled: false,
      coursePublish: {
        cover: ''
      }
    }
  },
  created() {
    if (this.$parent.courseId) {
      this.fetchCoursePublishById(this.$parent.courseId)
    }
  },
  methods: {
    /**
     * 上一步
     */
    prev() {
      this.$parent.active = 1
    },

    /**
     * 发布课程
     */
    publish() {
      this.publishBtnDisabled = true
      course.publishCourseById(this.$parent.courseId).then(response => {
        this.$parent.active = 3
        this.$message.success(response.message)
      })
    },

    /**
     * 获取课程发布信息
     * @param id 课程id
     */
    fetchCoursePublishById(id) {
      course.getCoursePublishById(id).then(result => {
        this.coursePublish = result.data.item
      })
    }
  }
}
</script>

<style lang="scss" rel="stylesheet/scss">
  .ccInfo {
    background: #f5f5f5;
    padding: 20px;
    overflow: hidden;
    border: 1px dashed #DDD;
    margin-bottom: 40px;
    position: relative;
  }
  .ccInfo img {
    background: #d6d6d6;
    width: 500px;
    height: 278px;
    display: block;
    float: left;
    border: none;
  }
  .ccInfo .main {
    margin-left: 520px;
  }

  .ccInfo .main h2 {
    font-size: 28px;
    margin-bottom: 30px;
    line-height: 1;
    font-weight: normal;
  }
  .ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
  }

  .ccInfo .main p {
    margin-bottom: 10px;
    word-wrap: break-word;
    line-height: 24px;
    max-height: 48px;
    overflow: hidden;
  }
  .ccInfo .main h3 {
    left: 540px;
    bottom: 20px;
    line-height: 1;
    font-size: 28px;
    color: #d32f24;
    font-weight: normal;
    position: absolute;
  }
</style>
